The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages
The sediments in Ace Lake in the Vestfold Hills, East Antarctica, contain a continuous sequence of diatom frustules that record the lake's history since its formation during the retreat of continental ice more than 9200 years ago. Frustules from six indicator groups: Pinnularia microstauron, Ni...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Online Access: | https://doi.org/10.1016/0031-0182(96)01657-4 http://ecite.utas.edu.au/9267 |
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ftunivtasecite:oai:ecite.utas.edu.au:9267 2023-05-15T13:56:40+02:00 The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages Fulford-Smith, S 1996 https://doi.org/10.1016/0031-0182(96)01657-4 http://ecite.utas.edu.au/9267 en eng Elsevier Science Bv http://dx.doi.org/10.1016/0031-0182(96)01657-4 Fulford-Smith, S, The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages, Palaeogeography, Palaeoclimatology, Palaeoecology, 124, (1-2) pp. 73-86. ISSN 0031-0182 (1996) [Refereed Article] http://ecite.utas.edu.au/9267 Earth Sciences Geology Palaeontology (incl. Palynology) Refereed Article PeerReviewed 1996 ftunivtasecite https://doi.org/10.1016/0031-0182(96)01657-4 2019-12-13T20:55:25Z The sediments in Ace Lake in the Vestfold Hills, East Antarctica, contain a continuous sequence of diatom frustules that record the lake's history since its formation during the retreat of continental ice more than 9200 years ago. Frustules from six indicator groups: Pinnularia microstauron, Nitzschia cylindrus, Nitzschia curta, Eucampia antartica, a freshwater Stauroneis species and several centric species in a sediment core were used to determine the sequence of the lake's evolution. The history of the lake falls into five stages. Ace Lake began as a marine inlet influenced by dynamic mixing of ocean and meltwater inputs. As the ice sheet retreated, isostatic uplift isolated the lake allowing it to be flushed by meltwater input from the retreating ice sheet. Over the course of 800 years (~9200- 8400 14C yr B.P.) the lake became meromictic supporting a freshwater diatom assemblage. Approximately 6700 years ago, coinciding with Antarctic sea level maxima, diatom assemblages indicate that seawater flooded over the sill into Ace Lake disturbing the freshwater meromixis. The sediments in this period were laminated and contained elemental sulphur suggesting that the marine input was limited in extent and energy. Approximately 5500 years ago this marine input ceased and the lake again became a meromictic basin which stabilised over 1700 years to become the lake that it is today and has been with little change for about the past 4000 years. Article in Journal/Newspaper Antarc* Antarctic Antarctica antartic* East Antarctica Ice Sheet eCite UTAS (University of Tasmania) Ace Lake ENVELOPE(78.188,78.188,-68.472,-68.472) Antarctic East Antarctica Vestfold Vestfold Hills Palaeogeography, Palaeoclimatology, Palaeoecology 124 1-2 73 86 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Palaeontology (incl. Palynology) |
spellingShingle |
Earth Sciences Geology Palaeontology (incl. Palynology) Fulford-Smith, S The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages |
topic_facet |
Earth Sciences Geology Palaeontology (incl. Palynology) |
description |
The sediments in Ace Lake in the Vestfold Hills, East Antarctica, contain a continuous sequence of diatom frustules that record the lake's history since its formation during the retreat of continental ice more than 9200 years ago. Frustules from six indicator groups: Pinnularia microstauron, Nitzschia cylindrus, Nitzschia curta, Eucampia antartica, a freshwater Stauroneis species and several centric species in a sediment core were used to determine the sequence of the lake's evolution. The history of the lake falls into five stages. Ace Lake began as a marine inlet influenced by dynamic mixing of ocean and meltwater inputs. As the ice sheet retreated, isostatic uplift isolated the lake allowing it to be flushed by meltwater input from the retreating ice sheet. Over the course of 800 years (~9200- 8400 14C yr B.P.) the lake became meromictic supporting a freshwater diatom assemblage. Approximately 6700 years ago, coinciding with Antarctic sea level maxima, diatom assemblages indicate that seawater flooded over the sill into Ace Lake disturbing the freshwater meromixis. The sediments in this period were laminated and contained elemental sulphur suggesting that the marine input was limited in extent and energy. Approximately 5500 years ago this marine input ceased and the lake again became a meromictic basin which stabilised over 1700 years to become the lake that it is today and has been with little change for about the past 4000 years. |
format |
Article in Journal/Newspaper |
author |
Fulford-Smith, S |
author_facet |
Fulford-Smith, S |
author_sort |
Fulford-Smith, S |
title |
The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages |
title_short |
The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages |
title_full |
The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages |
title_fullStr |
The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages |
title_full_unstemmed |
The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages |
title_sort |
evolution of ace lake, antarctica, determined from sedimentary diatom assemblages |
publisher |
Elsevier Science Bv |
publishDate |
1996 |
url |
https://doi.org/10.1016/0031-0182(96)01657-4 http://ecite.utas.edu.au/9267 |
long_lat |
ENVELOPE(78.188,78.188,-68.472,-68.472) |
geographic |
Ace Lake Antarctic East Antarctica Vestfold Vestfold Hills |
geographic_facet |
Ace Lake Antarctic East Antarctica Vestfold Vestfold Hills |
genre |
Antarc* Antarctic Antarctica antartic* East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica antartic* East Antarctica Ice Sheet |
op_relation |
http://dx.doi.org/10.1016/0031-0182(96)01657-4 Fulford-Smith, S, The evolution of Ace Lake, Antarctica, determined from sedimentary diatom assemblages, Palaeogeography, Palaeoclimatology, Palaeoecology, 124, (1-2) pp. 73-86. ISSN 0031-0182 (1996) [Refereed Article] http://ecite.utas.edu.au/9267 |
op_doi |
https://doi.org/10.1016/0031-0182(96)01657-4 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
124 |
container_issue |
1-2 |
container_start_page |
73 |
op_container_end_page |
86 |
_version_ |
1766264218520125440 |